ralometostat   Click here for help

GtoPdb Ligand ID: 13320

Synonyms: TNG-908 | TNG908
PDB Ligand
Compound class: Synthetic organic
Comment: TNG908 is a small molecule competitive, reversible inhibitor of protein arginine methyltransferase 5 (PRMT5) with selectivity for PRMT5 that is in complex with methylthioadenosine (MTA) [1], a product of the enzyme methylthioadenosine phosphorylase (MTAP), that is elevated in MTAP-deleted cancers. This MTA-cooperativity is utilised to exploit the synthetic lethal relationship between PRMT5 and MTAP deletion. The outcome is significantly increased killing efficay against MTAP-null cells compared to cells expressing wild type MTAP. The physicochemical properties of TNG908 support CNS penetration.
The chemical structure of TNG908 is identical to that for the INN ralometostat (proposed list 132, Feb. 2025).
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Ligand Activity Visualisation Charts

These are box plot that provide a unique visualisation, summarising all the activity data for a ligand taken from ChEMBL and GtoPdb across multiple targets and species. Click on a plot to see the median, interquartile range, low and high data points. A value of zero indicates that no data are available. A separate chart is created for each target, and where possible the algorithm tries to merge ChEMBL and GtoPdb targets by matching them on name and UniProt accession, for each available species. However, please note that inconsistency in naming of targets may lead to data for the same target being reported across multiple charts.

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View interactive charts of activity data across species

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2D Structure
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2D Structure

An image of the ligand's 2D structure. For small molecules with SMILES these are drawn using the NCI/CADD Chemical Identifier Resolver. Click on the image to access the chemical structure search tool with the ligand pre-loaded in the structure editor. For other types of ligands, e.g. longer nucleotides and peptides, a manually drawn representation of the molecule may be provided.

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Physico-chemical Properties
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Physico-chemical Properties

Calculated molecular properties are available for small molecules and natural products (not peptides). Properties were generated using the Chemistry Development Kit (CDK) (Willighagen EL et al. Journal of Cheminformatics vol. 9:33. 2017, doi:10.1186/s13321-017-0220-4; https://cdk.github.io/). All properties were selected to enable the prediction of the Lipinski Rule-of-Five profile or ‘druglikeness’ for each ligand. For more info on each category see the help pages.

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Hydrogen bond acceptors 7
Hydrogen bond donors 2
Rotatable bonds 5
Topological polar surface area 125.45
Molecular weight 409.51
XLogP 0.63
No. Lipinski's rules broken 0

Generated using the Chemistry Development Kit (CDK) (Willighagen EL et al. Journal of Cheminformatics vol. 9:33. 2017, doi:10.1186/s13321-017-0220-4; https://cdk.github.io/)
SMILES / InChI / InChIKey
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SMILES / InChI / InChIKey

SMILES (Simplified Molecular Input Line Entry Specification) A specification for unambiguously describing the structure of chemical molecules using short ASCII strings. Canonical SMILES specify a unique representation of the 2D structure without chiral or isotopic specifications. Isomeric SMILES include chiral specification and isotopes.

Standard InChI (IUPAC International Chemical Identifier) and InChIKey InChI is a non-proprietary, standard, textual identifier for chemical substances designed to facilitate linking of information and database searching. An InChIKey is a simplified version of a full InChI, designed for easier web searching.

Generated using the Chemistry Development Kit (CDK) (Willighagen EL et al. Journal of Cheminformatics vol. 9:33. 2017, doi:10.1186/s13321-017-0220-4; https://cdk.github.io/)

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Canonical SMILES C[C@H]1CC[C@H](C2=CC3=C(C=C2)SC=N3)N(C1)C(=O)C(=O)NC4=CC(=C(N)N=C4)C
Isomeric SMILES NC1=C(C=C(C=N1)NC(C(=O)N2[C@H](CC[C@@H](C2)C)C=3C=CC4=C(N=CS4)C3)=O)C
InChI InChI=1S/C21H23N5O2S/c1-12-3-5-17(14-4-6-18-16(8-14)24-11-29-18)26(10-12)21(28)20(27)25-15-7-13(2)19(22)23-9-15/h4,6-9,11-12,17H,3,5,10H2,1-2H3,(H2,22,23)(H,25,27)/t12-,17+/m0/s1
InChI Key NXXBDYHMHHINFC-YVEFUNNKSA-N

Generated using the Chemistry Development Kit (CDK) (Willighagen EL et al. Journal of Cheminformatics vol. 9:33. 2017, doi:10.1186/s13321-017-0220-4; https://cdk.github.io/)
Selectivity at enzymes
Key to terms and symbols Click column headers to sort
Target Sp. Type Action Value Parameter Concentration range (M) Reference
protein arginine methyltransferase 5 Hs Inhibitor Binding 8.7 – 9.5 pKd - 1
⤷ pKd 9.5 (Kd 3x10-10 M) [1]
Description: Affinity for MTA-PRMT5 complex
pKd 8.7 (Kd 1.9x10-9 M) [1]
Description: Affinity for apoPRMT5
protein arginine methyltransferase 5 Hs Inhibitor Inhibition 8.1 pIC50 - 1
⤷ pIC50 8.1 (IC50 9x10-9 M) [1]
Description: Inhibition of PRMT5 determined by an SDMA in-cell western assay in the HAP1 MTAP-isogenic cell line